Marriott has devalued Bonvoy points for booking Homes and Villas redemptions. Marriott has a curated competitor to Airbnb, Bonvoy is one of the key selling points against this behemoth competitor with a huge head start in the space. But Marriott has chosen to erode its advantage.
Put another way, given broader devaluations in the program over the past couple of years, Marriott is just playing catchup adjusting down the value of points for homesharing stays.